Earth moving machine



May 9, 1961 L. A. GRANT 2,983,496

EARTH MOVING MACHINE Filed Oct. 17, 1958 2 Sheets-Sheet 1 INV EN TOR.

Louis AQ ront May 9, 1961 L.. A. GRANT 2,983,496

EARTH MOVING MACHINE Filed oct. 17, 1958 2 sheets-sheet z INVENTOR.

Louis A. Grani ATTORNEY\ United States Patent() 2,983,496 Emmi MOVINGMACHINE Louis A. Grant, 501 Virginia Ave., akmont, Pa.

Filed Oct. 17, 1958, Ser. No. 767,942

`3 Claims. (Cl. 26213) This invention relates generally to earth movingmachinery and more particularly relates to a` drill! accessory orattachment for such machinery to enable remotely controlled drillingover a wide rangle of tilt relative to the boom, thereby enablingdrilling in heretofore inaccessible places. Y Y f An outstandingdisadvantage inthe use of pneumatically operated drills or air hammershas been that the operators handling such drills had to be exposed tothe dangerof dust and ilying particles of `stone as well as excessivevibration ofthe drill. Y fv An object of the present invention is toprovide pivotally movable attachment whereby a pneumatically operateddrill or air hammer can be remotely controlled as a component part of anearth moving machine, such as one sold under the trademark Gradall Afurther object of .the invention is to provide an accessory for yanearth moving machine, which accessory enables turning of a pneumaticallyoperated drill through a wide angular range so as to make the drilluseful for a wide variety of applications, such as fordigging bricklinings, and those of oxygen furnaces and open hearth furnaces, andsimilar applications.

Other objects or advantages of the invention will become more apparentfrom a study of the following description taken with the accompanyingdrawings wherein:

Fig. 1 is a top, plan view showing a drill mounting or accessoryatttached to a boom, shown cut away, and

- illustrating the principles of the present invention.

Fig. 2 isa side, elevational view of the assembly shown in Fig. 1, thedot and dash outline showing the lowermost angular position of tilt ofthe drill.

Fig. 3 is a side elevational view of a modification including a drilland bucket.

Fig. 4 is a cross-sectional view taken along line 4 4 of Fig. 3; rand lFig. 5 is a side elevational view of a further modification showing aboom mount which is rotatable about its own axis through an angle of360. v

Referring moreparticularly to Fig'sl 1 and 2 of the drawing, numeral 2denotes fa fragmentary portion of a boom of an earth moving machine,such as sold under ICC linkage for effecting such angular movement ofthe drill comprises a link 15 having an end portion pivoted at 16 to thecradle 6 and another end portion connected to a rocker arm 18 pivoted onshaft 12. Thus an effective parallelogram linkage is provided.- Thus,the crane operator, by well known control means at the cab, after theboom is suitably extended may tilt the rocker arm 18 to any desiredangular position about shaft 12 as a center, so as to secure any desiredangle of tilt of tool 7a with respect to the boom, through a range of ahorizontal position, as shown, to a vertically downwardly positionasillustrated in dash and dot lnies.

Figs. 3 and 4 show a modification which is similar to Figs. l and 2except that a bucket 19 of conventional type is mounted, at its forwardand rearward end portions, to cradle 6 so as -to enable the operator toselectively use either the drill or the shovel 19 depending on theoperai rock on the forward motion and then upon rearward the trademarkGradall and which is illustrated in Fig. 5

Numerals 3 and 4 denote clamps for rotatably mounting `a sleeve S whichis rigidly secured to a cradle 6. Mounted in the cradle 6 is an airhammer or .pneumatically operated drill 7 which is clamped onto thecradle by means of stationary clamps 8 and 9. The `air hammer 7 issupplied by Iair under pressure through flexible tubing 10V connected toacoupling'll which, in turn, is connected to an air pump or othersuitablesource of air pressure mounted on the vehicle. The air hammer 7has attached thereto a bit or drill 7a which is reciprocated along theaxis of the hammer 7 in a well-known manner.

It will appear that the cradle 6 ispivotally movableY through a widerange of angles'relative to boom, extend-Y motion, the shovel 19 .may beused to scoop up the broken rock.V

Fig. 5 shows a further modification of the invention which enables theGradall operator to move the cradle 28 and drill 30 to anydesired angleof tilt, even in a vertically upward direction. More specifically, theGradall o-r other earth moving cab 21 has control means by which theboom 24 is pivoted on brackets 22 and 23 so as to move through avertical plane. In addition, means are provided, which include gear 27driven by a pinion (not shown) whereby the entire boom 24 may be rotatedthrough an angle of 360 `about its own longitudinal axis. The boomextension 25, of course, may be telescoped with respect to boom portion24 so as to extend the length of lthe boom. Thus, not only is the cradle28 movable about the pivot 29 through an angle of substantially 90,since it is of the same construction as shown in Figs. l and 2, but theentire boom, upon rotation about its own axis, will enable the drill 30to be moved also throughout a 360 arc in a vertical plane at rightangles to the boom and thereby enable movement of the tool throughout ahernispherical path of movement. This is particularly desirable ininstances were it is desirable to drill into the roof of a structure orinto a portion which is` above the boom.

Thus it will be seen that I have provided an efficient accessory for anearth moving m-achine, vsuch as one known bythe trademark as Gradall,which accessory is readily attachable tothe forward end portion of aboom so it may serve asl a mounting for a drill or other tool and whichwill enable the tool to be angularly vertically moved from thehorizontal position; furthermore, `l have provided ia. furtherimprovement whereby the aforesaid tool may be additionally movedthroughout a circle of,

360 in a vertical plane at righit angles to the boom to allow a widevariety of angular movement of the drill or other tool with respect tothe boom and thus enable f these are by way of illustration only, andthat'variousV changes and modiiications may be'mad'e within thecontemplation of my invention and within the scope of the followingclaims. n

I claim: Y l. An earth moving .machine including a boom, a cradle havingan end portion pivotally connected to the free end of said boom, linkagemeans connecting a free end portion .A of said boom toa portion lof saidcradle laterally otset from said pivotally connected, cradle end portionfor pivotally moving said cradle through an angle of substantially 90with respect to the longitudinal axis of said boom, a pneumaticallyoperated tool seated within said cradle, clamp means extendingtransversely across the top of said cradle for clamping said tooltherein, said cradle and tool being so proportioned with respect to thefree end portion of said boom so las to be substantially whollycontained within the space defined by longitudinally projecting the freeend portion of said boom when the cradle and boom are in a positionwherein their longitudinal axes are substantially coextensive with thelongitudinal axis of said boom, whereby the drill, cradle and boo-m maybe projected through relatively small openings, and whereby the drillmay be selectively moved from a position substantially coextensive withthe longitudinal axis of said boom to one substantially at right anglesthereto.

2. An earth moving machine as recited in claim l together with a bucketsuspended by a said cradle to enable selective operation of said tool orsaid bucket.

3. An earth moving machine including a boom mounted on said machinehaving telescoping parts and being rotatable about its longitudinal axisthroughout an angle of substantially 360, a cradle having an end portionpivotally connected to the end portion of the outermost part of saidboom, linkage means connecting said last mentioned end portion toaportion of said cradle laterally offset from saidv pivotally connected,cradle end portion for pivotally moving said cradle through an angle ofsubstantially with respect to the longitudinal axis of said boom, apneumatically operated, tool seated within said cradle, clamps extendingtransversely across the top of said cradle for rclamping said tooltherein, said cradle and tool being so proportioned with respect to saidoutermost part of the boom so as to be substantially wholly containedwithin the space dened by longitudinally projecting said outermost partwhen the cradle and boom are in a position wherein their longitudinalaxes are substantially `coextensive with the longitudinal axis of saidboom, whereby the drill, cradle and boom may be projected throughrelatively small openings, and whereby the drill may be selectivelymoved throughout substantially a hemispherieal path to enable digginginto ceilings, walls and floors at selective angles. v

References Cited in the le of this patent UNITED STATES PATENTS

